How does the body Burn Fat?
How exactly does the body burn fat? How is it broken down and used as energy? Once the fat is burned where is it deposited?
Was just having a work out this morning and curiosty hit me!
Thanks everyone 
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When your body moves (or any cell in your body does any type of ”work”) it needs energy. The amount of energy needed is measured as a unit of heat—or a calorie. The fuel to produce this energy comes from several sources, mostly fat and carbs (glucose), and occasionally amino acids (protein). How and when fat is ‘”burned” (or metabolized to provide energy for the body) and how that affects Body Fat levels and weight is a very complex area of physiology research. There have been hundreds, maybe thousands, of studies exploring the utilization of fat for energy under a variety of different conditions. There is still much to be understood, but this is how we know it works so far:
Whether you are watching TV or running around a track, the fuel your body uses to give you the calories your cells need for energy comes from burning mostly fat and carbs. Your body nearly always burns a mix of both fat calories and carb calories. So normally, for every calorie burned, the fuels are around a 50/50 split of both fat and carbs.
How hard you are moving during exercise is one major determinant of which fuel your body will use. Carbs provide a faster energy source. So whenever you need to do something fast or produce force, carbs are the better fuel. Fats are favored during long, low-intensity activities. It’s not that you stop using one or the other fuel, it’s that the ratio of both shifts depending on your activity. In more scientific terms, you alternate between aerobic (more fat-burning) and anaerobic (more carb-burning) metabolism.
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